If bugs have their own Tori Amos, she is likely writing about sexual conflict and how reproduction exists at all given that it can be so costly, especially to females. One aspect of this conflict concerns how females respond to increased mating events that are of more benefit to males than to themselves.
New work discusses how some males, instead of mating conventionally, take the awkward step of piercing and penetrating their mate through her body wall. This mating behavior is known as traumatic insemination and it potentially comes at a great physiological cost to the female.
Traumatic insemination is known across several insect lineages and is thought to have evolved due to the increased reproductive success of males that employed it. This is because males are able to avoid female control of fertilization. It is, as you can imagine, thought to be very costly to female survival and in recent years scientists have identified unique counter adaptations in female physiology that reduce the costs imposed by traumatic insemination. This includes evolution of completely new organs to help prevent infection through this mating method.
Scanning Electron Microscopy still image of a mated female bug with wings removed to see mating wounds, which are found on the upper right area of the abdomen. Credit: Umeå University
Umeå University researcher Tom Cameron and his co-authors explored the costs of traumatic insemination for female Warehouse pirate bugs, Xylocoris flavipes. A small predatory insect often used in biological control programs to protect dried foods such as grain and nuts.
The investigation showed that despite the clear differences in taxonomy, evolutionary history, mode of predation, size and position of entry, pirate bugs largely respond in the same way as other taxa that employ traumatic insemination such as the parasitic bedbug Cimex lectularius.
"We found that multiple mated females die young, but they make up for it by laying more eggs each day," says Dr. Cameron.
Whether this behavior is adaptive on the part of the female or is manipulation of the female by the male via chemicals introduced to her via sperm transfer remains to be explored.
Citation: Amy Backhouse, Steven M. Sait and Tom C. Cameron, 'Multiple mating in the traumatically inseminating Warehouse pirate bug, Xylocoris flavipes: effects on fecundity and longevity', Biology Letters (2012), doi: 10.1098/rsbl.2012.0091
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Lexus Hoverboard Gets Off The Ground
- EWG's Little Site Of Horrors
- Predictive Coding Theory: How Our Brains Recognize Faces From Minimal Information
- What May Be Missing From Quantum Computing - A Quantum Middle Man
- Sepsis Is Largely Unknown But It Puts One Million People In The Hospital Each Year
- Medial Temporal Lobe And How New Memories Are Formed
- "Well put!..."
- "I really enjoyed this article! I haven't read the references that you posted, but I am curious..."
- "Incrementalism is a political strategy that is used across the board for better or for worse by..."
- "Diversity is worshipped as some sort of talisman, but trying to create diversity is attacking the..."
- "I noticed that I (and many others) have trouble digestion the complex sugars in many vegetables..."